Quality of Service in Heterogeneous Networks [electronic resource] : 6th International ICST Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness, QShine 2009 and 3rd International Workshop on Advanced Architectures and Algorithms for Internet Delivery and Applications, AAA-IDEA 2009, Las Palmas, Gran Canaria, November 23-25, 2009 Proceedings / edited by Novella Bartolini, Sotiris Nikoletseas, Prasun Sinha, Valeria Cardellini, Anirban Mahanti.